[Question] How can I dim screen after 20s inactivity when running on battery? tlp/sway/arch/chromebook

I think this could save me some battery time. I checked tlp but could not find anything related. In Sway config with swayidle maybe? All help appreciated.

5 comments

You could use swayidle and add a line to use either light or brightnessctl to dim and restore the brightness. Or just as I do turn off display after a certain time. This link should give you an idea. https://wiki.archlinux.org/title/Sway#Idle
- Brightnessctl is installed and works just need a way to read whether is on ac or battery.
  
  @JustineSmithies @rkk Should be able to read it from /sys/devices/ or with upower.
Are you running arch on the metal or through crostini/crouton? The second option probably will only respect chromeos' power management settings, but you may be able to flash a full uefi payload and get rid of chromeos completely with https://mrchromebox.tech/#fwscript
- Yeah, i got all that (coreboot+arch)